Kula Deivam was based on a Bengali film Banga Kora by noted writer Prabhavathi Devi Saraswathi

1956 Tamil film directed by P. Pullaiah

Madhavan marries Thangam. He takes care of Thangam’s mother and brother along with his younger brother. Meanwhile, Madhavan gives shelter to his father’s mistress and her daughter. The evil ladies allege Thangam for loose morals. The rest of the story is how they come into good terms.

Lalitha is the eldest daughter of a pious and conservative Brahmin family. She has eight siblings and poverty rules reign. She decides to take up the family mantle and goes to work. Due to family needs and ill fate, she ends up as a prostitute but manages to settle all her brothers and sisters. Her family ditches her when they come to know about her dark side. Thangavelu, a man who was once rejected by her marries her. She loses her sanity in the end.